/**
* Returns whether the entity tags sent with the request match that
* given by the response.
*
* @return bool
*/
protected function matchEntityTags()
{
if ($responding = $this->response->getHeader("ETag")) {
$requested = $this->request->getETags();
return $requested && (in_array($responding, $requested) || in_array("*", $requested));
}
return false;
}
/**
* Determines if the Response validators (ETag, Last-Modified) match
* a conditional value specified in the Request.
*
* If the Response is not modified, it sets the status code to 304 and
* removes the actual content by calling the setNotModified() method.
*
* @param Request $request A Request instance
*
* @return bool true if the Response validators match the Request, false otherwise
*/
public function isNotModified(Request $request)
{
if (!$request->isMethodSafe()) {
return false;
}
$notModified = false;
$lastModified = $this->headers->get('Last-Modified');
$modifiedSince = $request->headers->get('If-Modified-Since');
if ($etags = $request->getETags()) {
$notModified = in_array($this->getEtag(), $etags) || in_array('*', $etags);
}
if ($modifiedSince && $lastModified) {
$notModified = strtotime($modifiedSince) >= strtotime($lastModified) && (!$etags || $notModified);
}
if ($notModified) {
$this->setNotModified();
}
return $notModified;
}
